graphics/egl-wayland: unbreak with libglvnd < 1.3.4 after 2aaa530

In file included from ../src/wayland-thread.c:29:
In file included from ../include/wayland-egldisplay.h:31:
../include/wayland-eglhandle.h:112:9: error: unknown type name 'PFNEGLSTREAMIMAGECONSUMERCONNECTNVPROC'
        PFNEGLSTREAMIMAGECONSUMERCONNECTNVPROC      streamImageConsumerConnect;
        ^
../include/wayland-eglhandle.h:113:9: error: unknown type name 'PFNEGLSTREAMACQUIREIMAGENVPROC'
        PFNEGLSTREAMACQUIREIMAGENVPROC              streamAcquireImage;
        ^
../include/wayland-eglhandle.h:114:9: error: unknown type name 'PFNEGLSTREAMRELEASEIMAGENVPROC'; did you mean 'PFNEGLSTREAMFLUSHNVPROC'?
        PFNEGLSTREAMRELEASEIMAGENVPROC              streamReleaseImage;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        PFNEGLSTREAMFLUSHNVPROC
/usr/local/include/EGL/eglext.h:1207:34: note: 'PFNEGLSTREAMFLUSHNVPROC' declared here
typedef EGLBoolean (EGLAPIENTRYP PFNEGLSTREAMFLUSHNVPROC) (EGLDisplay dpy, EGLStreamKHR stream);
                                 ^

Reported by:	many

graphics/egl-wayland/Makefile

@@ -17,6 +17,8 @@ USE_GITHUB=	yes
 USE_GL=		egl
 USE_LDCONFIG=	yes
 GH_ACCOUNT=	NVIDIA
+GH_TUPLE=	KhronosGroup:EGL-Registry:745e9ad:egl_registry
+CPPFLAGS+=	-I${WRKSRC_egl_registry}/api -isystem${LOCALBASE}/include
 
 post-patch:
 	@${REINPLACE_CMD} -e "/install/s/datadir')/prefix'), 'libdata'/" \

graphics/egl-wayland/distinfo

@@ -1,3 +1,5 @@
 TIMESTAMP = 1630704333
 SHA256 (NVIDIA-egl-wayland-1.1.8_GH0.tar.gz) = 12bee9accf121987b0f0d6fb1a4e3b1fc5855b116c50d8d9e035edd02c82f88c
 SIZE (NVIDIA-egl-wayland-1.1.8_GH0.tar.gz) = 53776
+SHA256 (KhronosGroup-EGL-Registry-745e9ad_GH0.tar.gz) = 062ee7f4e30a867c6d6657bfe8b605536a176c8856136dfb26c9b96f326aeb07
+SIZE (KhronosGroup-EGL-Registry-745e9ad_GH0.tar.gz) = 3359483